Operating device for gas-stoves.



J. E. KENNEDY.

OPERATING DEVICE FOR GAS STOVES.

APPLICATION FILED JULY 11, I914.

1,151,108. Patented Aug. 24, 1915.

EMT

FFIE,

OPERATING DEVICE FOR GAS-STOVES.

Specification of Letters Patent.

Patented Au 2 1, 1915.

Application filed July 11, 1914. Serial No. 850,380.

To aZZ whom it may concern Be it known that I, JAMES E. KENNEDY, a citizen of the United States, residing at \Vashington, in the District of Columbia, have invented new and useful Improvements in Operating Devices for Gas-Stoves, of which the following is a specification.

The invention relates to stoves, and more particularly to gas ranges and the like, and has for an object to provide a device whereby the supply of gas to the burner and the ignition thereof at the burner will be controlled by placing a vessel upon, or removing the same from, the stove.

The invention contemplates, among other features, the provision of means for controlling the supply of gas from the gas supply pipe to the burner and whereby the supply of gas to the burner will be uninterrupted when a vessel is placed upon the stove and will be interrupted or cut off upon removing the cooking or other vessel from the stove, a pilot light being provided to insure the ignition of the gas at the burner at the moment the gas is admitted thereto.

The invention still further comprehends various improvements over a patent on a burner for gas stoves, granted to me August 19, 1918, No. 1,070,812.

In the further disclosure of the invention reference is to be had to the accompanying drawings, constituting .a part of this specification, in which similar characters of reference denote corresponding parts in all the views, and in which:

Figure 1 is a fragmentary vertical sectional view taken through a gas stove, showing my invention applied thereto; Fig. 2 is a bottom plan view of the stove shown in Fig. l; and Fig. 3 is a perspective view of the operating member. Fig. 4: is a fragmentary enlarged vertical transverse sectional view of the valve; Fig. 5 is a vertical sectional view taken on the line 55 in Referring more particularly to the views, I disclose a stove 10 having a top 11 on which is arranged the'usual grid 12, agas supply pipe 13 being provided to supply gas to a burner 11 through the medium of a coupling 15 connecting the gas supply pipe with the burner.

Mounted to swing on the under side of the top 11 is a bell crank lever 16, having its ends terminating in substantially circular bearing heads 17, and mounted to swing upon the top 11am hinged on its under side 1s an operating member 18 including a cap. 19 and having a free end 20 thereof provided with a slot 21 in which operates one of the bearing heads 17 of the bell crank lever 16, this bearing head being formed on the shorter arm of the bell crank lever. The operating member 18 is counterbalanced by a weight 22 which is arranged to slide on suitable guide pins 23 projecting from a stirrup-like end 21 of the operating member and at which end the operating member is pivoted to the under side of the top. The sliding of the weight upon the pins 23 is controlled by a screw 25 which, swiveled to the weight,is in threaded engagement with a transverse portion 26 of the stirrup-like end 24. i

The burner 14: has its inner end supported by a member 27 forming a part of the coupling 15 and the outer end of the burner terminates in a shank 28 carrying a cross piece 29 which is supported by a plurality of brackets 30 on the under side of the top 11 so that the burner will be dependingly supported beneath the grid 12 and beneath the medial portion of the cap 19 of the operating member 18. A pilot light tube 31 has its outer end arranged to slide in a depending bracket 32 on the under side of the burner 14: and carries a tip 33 arranged in juxtaposition to the burner and projecting upwardly through the usual central opening 34; in the burner.

The inner end of the pilot light tube 31 is suitably connected to a member 35 which is freely revoluble on a head dependingly supported on the lower end of a pipe 37 connecting with a valve 38 arranged or movably supported on the coupling 16, and which will not interfere with the usual manually controlled valve39, it being readily understood that a supply of gas from the pipe 13 will readily pass into the pipe 37 and thence through the head 36 and member 35 into the pilot light tube 31 from which it .will be conveyed to a point adjacent the burner 14:, and it will be further understood that the valve 38 also controls the supply of gas from the supply pipe 13 directly to the burner 14 to the extent that when the valve 38 is in one position the supply of gas from the supply pipe 13 will readily pass into the burner 14, whereas when the valve is in another position a supply of gas from the sup ply pipe 13 to the burner 1 1 will be interrupted and shut off, said valve 38, however, being so arranged and constructed that a constant supply of gas from the supply pipe 13 to the tip 33 of the pilot light tube 31 will be insured at all times. To this end the valve 38 consists, more particularly, of a rotatable valve body 38 provided with a grooved portion 38 which, when the valve proper 38 is in open position will permit the gas in the supply pipe 13 to pass into the burner pipe indicated by the numeral 38, the gas being adapted to flow to the burner when the valve 38 is in open position and prevented from flowing to the burner when the valve is in closed position, the initial passage 38 of the burner pipe being at all times open and not affected by the operation of the valve proper. The valve proper is provided with a passage 38 and mounted thereon to control the supply of gas through the passage is a needle valve 38 arranged to operate through a stufling box 38 and terminating at the outer end in a suitable knurled handle 38 Threaded on to the valve body is a pipe section 38 to which the gas in the passage is adapted to flow when the needle valve is in open position, the lower end of the pipe section having threaded thereto a tubular socket 38 encircled by a sleeve 38 connected to the pilot light tube 31. Thus it will be seen that-the pilot light tube 31 is movable forwardly and rearwardly with respect to the means which support it and now referring to Fig. 1 it will be clearly seen that the other or longer arm of the bell crank lever 16 depends to have its particular bearing head 17 received in a substantially U-shaped bracket 40 arranged to slide on the pilot light tube 31, and which provides a suitable connection between the bell. crank lever and the pilot light tube. This bracket 40 has an apertured lugl pro jecting therefrom and through the aperture of which passes the outer end of an adjusting screw 42 swiveled to the bracket 40 and in rigid engagement with a support 13 which can be readily adjusted upon the pilot light tube by means of a suitable screw 44:, the outer end of the screw 42 having a suitable knurled knob 45 whereby it can be readily operated so as to move the longer end of the arm of the bell crank lever toward or away from the inner end of the pilot light tube. This construction, it will be seen, provides for an adjustment of the operating member 18 whereby the operating member and grid or cap 19 thereof, can be raised or lowered with respect to the grid 12, said cap 19 normally projecting a slight distance above the grid. As a further means of adjusting the operating member it will be seen that the balancing weight 22 can be adjustbe so adjusted that the operating member will operate very readily even when the lightest of cooking vessels is placed upon the grid 12 and whereby it will result in the depression or moving downwardly of the operating member 18 which will be immediately returned to its normal position by the balancing weight 22 when the vessel is removed from the grid.

,N ow when the device is in the position shown in Fig. 1, it will be clearly seen that the valve 38, interrupting the supply of gas from the supply pipe 13 to the burner 14, will, however, not prevent a supply of gas passing through the valve and into the pilot light tube 31, said gas being ignited to produce a flame at the tip 33. At the moment the vessel is placed upon the grid, thus depressing the operating member 19, the bell crank lever 16 will be actuated, thereby causing the pilot light tube 31 to swing rearwardly and actuate the valve 38 so as to open the valve and permit the passasge of gas from the supply pipe 13 to the burner 14 and at which place the gas will be ignited by the flame issuing from the tip of the pilot light tube. When the vessel is removed from the grid the balancing weight22 will cause the operating member 18 to return to normal position, thus through the medium of the bell crank lever 16 swinging the pilot light tube inwardly and causing the valve 38 to be closed so as to interrupt the supply of gas from the supply pipe 13 to the burner 14. without, however, interrupting the supply of gas from the supply pipe 13 to the tip 33 of the pilot light tube. It will be clearly seen that by adjusting the long arm of the bell crank lever relatively to the pilot light tube through the medium of the screw 42, the extent to which the valve 38 will be opened or closed can be readily controlled so that the flame produced at the burner can be a full or half flame, as desired.

Having thus described my invention, I claim:

1. In a gas stove including a burner and a cock for controlling the supply of fuel to the burner, a bell crank lever mounted to swing on the stove, a weighted operating,

said weighted element is actuated, and means for adjusting said weighted element.

2. In a gas stove including a burner and a cock for controlling the supply of fuel to the burner, a bell crank lever mounted to swing on the stove, a weighted operating element movably supported on the stove and having an end thereof associated with an arm of the bell crank lever, a pilot light member connecting with the said cock to actuate the same, an adjustable connection between the pilot light member and the other arm of the bell crank lever for adjusting the throw of the pilot light member relatively to the weighted element, and means for adjusting the movement of said weighted element.

3. The combination with a gas stove including a supply pipe to its burner, with a controlling cock for the supply pipe, a pilot light member connecting with and operating said cock, an operating member formed to provide a cap and opposed shanks, one of which terminates in a supporting frame and the other of which terminates in a head, said supporting frame being pivoted on the stove, a weight on the frame and a lever pivoted on the stove and connecting with the head of the operating member and with the pilot tube member.

4. In combination with a gas stove having a supply pipe to the burner thereof, a pilot light member, a controlling cock for the supply pipe and operable by said pilot light member, an operating member forming a cap and having one end pivoted on the stove, a bell crank lever mounted to swing on the stove and having an end associated with the free end of the operating member, a bearing on the pilot light member and having the other end of the bell crank lever movably connected therewith, and a Weight carried by said operating member adjacent its pivotal connection with the stove.

5. In combination with a gas stove having a supply pipe to the burner thereof, a pilot light member, a controlling cock for the supply pipe and operable by said pilot light member, an operating member forming a cap and having one end pivoted on the stove, a bell crank lever mounted to swing on the stove and having an end associated with the free end of the operating member, a bearing on the pilot light member and having the other end of the bell crank lever movably connected therewith, a weight carried by said operating member adjacent its pivotal connection with the stove, and means for adjusting said weight with respect to said operating member and its pivotal connection with the stove.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES E. KENNEDY.

Witnesses:

E. EDMoNsToN, Jr., F. A. HOSTER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

